Tool-holder



W. C. BROOKS.

TOOL HOLDER.

APPLICATION FILED MAY 21. m9.

Patented Feb. 10, 1920.

INVENTOR. fl wzz; 4%

WI TNESS:

A TTORNE Y.

PATENT OFFICE.

UNITED STATES WALTER C. BROOKS, OF SPRINGFIELD, MASSACHUSETTS.

TOOL-HOLDER.

Specification of Letters Patent.

Patented. Feb. 10, 1920.

Application filed May 21, 1919. Serial N0. 298,766.

To all whom it may concern:

Be it known that I, WALTER C. BROOKS, a citizen of the United States ofAmerica, and a resident of Springfield, in the county of Hampden andState of Massachusetts,-

pensive, compact, convenient, strong and.

durable holder, which is capable of being secured in place either bymeans of a bolt passing through the body of said holder, or by magneticmeans, and which at the same time is adapted to hold securely in theproper manner at the correct angle any one of various cutting toolswhile the tool is being ground.

Other objects and advantages will appear in the course of the followingdescription.

I attain the objects and secure the advantages of my invention by themeans illustrated in the accompanying drawings, in which- Figure 1 is atop plan of a tool holder which embodies a practical form of myinvention; Fig. 2, a side elevation of said holder; Fig. '3, anelevation of the boringtool end of the holder, showing such a tool inplace therein; Fig. i, an elevation of the turning-tool end of theholder, showing such a tool in place therein, and, Fig. 5, a verticalsection through the body or block of the holder, taken through thetransverse passages therein.

Similar reference characters designate similar parts throughout theseveral views.

Although the holder block more often rests on some one of its side facesthan on its bottom while in use, for the purpose generally of thisdescription, such block is assumed to rest on such bottom, as shown; andthe tools represented as being secured in the holder, in Figs. 3 and 4,may not be disposed to the best advantage for grinding, but theirpresence serves to illustrate clearly the manner in which they are heldin place.

My tool holder comprises a block 1, a vertical clamp 2 mounted. on a pin3 and a clamp screw t at one end of said block, a horizontal cross-piece5 at the other end of said block, and a clamping screw 6 tapped into andthrough such cross-piece.

' The block 1 has a top and bottom which are parallel with each other,sides which converge from the central horizontal plane of said blocktoward said top and bottom, an end that is at right-angles to said topand bottom, and an end that inclines downwardly and outwardly from saidtop. There is a transverse, V-shaped groove 7 in the perpendicular endnear the top of the block 1,

and a channel 8 in the center of the inclined or oblique end of saidblock. The channel 8 extends from the top of the block 1 to the bottomof said block on to a cutaway por- .tion 9 thereof at the lower end ofsaid chanblock from the inclined faces on one side to the inclined faceson the other side, all of said passages intersecting within the block,as best shown in Fig. 5. Each passage 11 extends from an upper inclinedface on one .side to the lower inclined face on the opposite side of theblock, and is at right-angles .to such faces, which latter are parallelwith each other. The passage 10 is at right- 7 angles to the top andbottom of the block.

These passages are designed to receive bolts for securing the block inplace on the grinding-machine, as presently will be more fullyexplained, and should be located far enough from the oblique end of theblock so that a bolt (not shown) in the passage 10 and a tool (as 12) inthe channel 8 do not interfere with each other.

The pin 3 projects from the perpendicular end of the block 1, in thelongitudinal, central, vertical plane and below the horizontal, centralplane of said block, and the screw l is tapped into said block directlyover said pin and above said last-named plane. The pin 3 is received ina hole 13, Fig. 3, in the clamp 2, which hole is near the lower end ofsaid clamp and large enough to permit the clamp to move to the extentnecessary in the clamping operation. The screw 1 passes through theapproximate center of the clamp 2, and may be rotated freely therein.The upper end of the clamp 2 is adjacent to the groove 7 The clamp 2 hason the inner side at the top and bottom, respectively, projections orribs 1st and 15, the latter being designed to bear against thecontiguous end of the block and the former to bear on a tool (as 16) inthe groove 7, when thescrew l: is tightened.

The tool 16, shown in Fig. 3 and having a portion of its stem brokenout, is an ordinary boring tool, and, when the:samezis-toibe ground, itis placed in the groove 7 and properly adjusted therein, and the screw 4is tightened to force therib 14 of the clamp 2 hard against said tool,the rib 15 of said clamp meanwhile bearing directly on the block 1.=Ready aneans are thus afforded for properly positioning and se curelyholding the tool 16. Said toolis released by loosening the screws andremoved by withdrawing it'fronr' the groove7. The pin 3 prevents theclamp '2 from turning on or with the screw t during the tightening andloosening operations.

The cross-piece 5' has the general form of an inverted T. Saidcross-piece spans the channel 8, and the lateral arms of the crosspieceare secured to the block 1 by means of two screws" 17 which pass throughsuch arms into the contiguous end of said block. 'The screw 6 is carriedby the upstanding arm of thecross-pieceo. Any tool not too large toenter the channel 8' and be received behind the cross-piece 5 maybesecured in place in said channel. In other words, the tool in questionneed not fill the channel 8.

The tool 12, shown inFig; 4t and which is an ordinary turning tool, isslipped into the channel 8 and secured therein by. the screw 6, when itis'desired to grind such tool. The tool 12, is placed with one sideagainst one side of the channel 8 andgiven 'the'desired amount ofprojection before tightening the screw 6 against the contiguous sidethereof. Said tool must, of course, be so; placed in thegroove 8 thatthe sharp edge of the tool is in a plane; parallel with that of the topof the block 1. Upon loosening the screw 6 the tool 12 can be slippedout of the groove 8. Thus ready means are provided for properlypositioning and securely holding the tool 12.

For grinding the tool 16, the block 1 is placed on the oblique facethereof which is the more remote from but on the same side withthecutting end and the part of said tool thatis to be ground. "The blockisheld in this position on or in the grinding machine, while the tool isground, by magnetic means, or by a bolt' passing through the passage 11thatopens throughthe aforesaid oblique face, as the case maybe. Theangle of this face'corresponds withor determines the angle of theground'part of the tool 16.

For grinding the tool 16, the block 1 is first placedon the obliquefacethereof which is-most rem.0tefr0m the "side of the cutting part ofsaid tool that is to be ground first.

The block is held in this position in the grinding machine, while theaforesaid side of the cutting part of the tool is ground, by

.ma 'netic means or b r a screw )assin b 7 to through the passage 11that opens through the aforesaid oblique face. The block is then turnedover and placed on the oblique face which is-most remote from the sideof the cutting part of the tool that is to be ground next. The block isheld in this latter position, while the said-side of the cutting part ofthe tool is ground, by magnetic means, or by a screw passing through theother passage 11. The angles of the oblique faces of the blockcorrespond with or determine the angles of the ground sides of thecutting part of the tool 12.

Hit bedesired to grind oil the sharp edge of the tool 12, or to grindthe ridge of va tool of this character, the block is set on its bottomin the grinding n'iachine and held by magnetic means or by a -boltpassing -mounting the block 1 on a horizontal, supporting member of thegrinding machine,

but said block might be mounted otherwise, if necessary, in order tomeet other conditions, as in a machine the work-holdingand grindingelements of which are: arranged. differently relatively from those in anordinary grinder.

'Moreorless modification and change may -beimade in the shape, size,construction, and

arrangement of some or all of the parts of my tool holder, withoutdeparting from the "spirit of my invention, or exceeding the scope ofwhat is claimed.

WVhatI claim as my invention, and desire to' secure by Letters Patent,is

1. A tool holder, of the class described, comprisinga block the sides ofwhich convergefrom .the approximately central horizontal plane towardthe top and bottom of said block,- said top and bottom being parallel,one end of said block being at rightangles to said top and bottom, andthe other end of said block being oblique, and toolclamping means atsuch ends.

2. A tool holder, of the class specified, comprising a solid block flaton the top and bottom and having sides which converge from theapproximately central horizontal plane of said block toward said top andbottom, said block having bolt-receiving passages-which open through thefour converg- 111g faces of said s1des,-and-end tool-clamping means.

A tool holder,-of the class described, comprising a solid block, the topand bottom of which are fiat and parallel, said block having abolt-receiving passage which opens through said top and bottom, andmeans to clamp a tool to one end of said block.

4. A tool holder, of the class described, comprising a solid block thesides of which converge from the approximately central horizontal planetoward the top and bottom of said block, said to and bottom beingparallel, and said blocE having bolt-receiving passage which openthrough the converging faces of said. sides and through said top andbottom, and end tool-clamping means.

5. A tool holder, of the class described, comprising a block havingoblique sides and a. transverse approximately V-shaped groove in oneend, and clamping means at such end adapted to engage a tool placed insaid groove.

6. A tool holder, of the class described, comprising a block havingoblique sides and a transverse approximately V-shaped groove in one end,and provided at such end with a pin, a clamp mounted on said pin, and ascrew passing through said clamp and tapped into said block, the freeend of said clamp being adjacent to said groove.

7. A tool holder, of the class described, comprising a block havingoblique sides and an oblique end and a longitudinal channel in such end,and clamping means at such end adapted to engage a tool placed in saidchannel.

8. A tool holder, of the class described, comprising a block havinoblique sides and an oblique channeled en a cross-piece secured to suchend across the channel therein,

of said block having a downward and outward inclination from said top,and also having a channel extending lengthwise thereof, a pin and screwprojecting from said first-named end, a clamp mounted on said pin andscrew and adapted to engage a tool 1n said groove, a cross-piece at saidsecond-named end, and a screw carried by said cross-piece and adapted toengage a tool in said channel.

WALTER G. BROOKS. Witnesses:

F. A. CUTTER, ARTHUR A. BETH.

